Sheet stacking apparatus and image forming system equipped therewith

An image forming system comprising:

• (a) an image forming apparatus for forming an image on a recording sheet;
• (b) a plurality of sheet stacking devices each provided downstream of the image forming apparatus in a conveyance direction of the recording sheet and connected with the image forming apparatus, for stacking the recording sheet delivered from the image forming apparatus;
• and
• (c) a controller for controlling the image forming apparatus and the plurality of sheet stacking devices,
• wherein the plurality of sheet stacking devices comprise:
• at least a first sheet stacking device having a first rack for stacking the recording sheet thereon, which is provided downstream in the conveyance direction and connected with the image forming apparatus;
• and
• a second sheet stacking device having a second rack for stacking the recording sheet thereon, which is provided downstream of the first sheet stacking device in the conveyance direction and connected with the first sheet stacking device, and
• (d) a job stop button provided on an operation section always located above at least one of the first and second racks that is turned on by an operator while a job execution is in progress and forcibly stops a printing job by initiating a sequence
• wherein the controller controls the sheet stacking device in which the job stop button has been turned on to stop a stack of a recording sheet to the rack of the sheet stacking device in which the job stop button has been turned on after the stack of a sheet on which an image is being formed is completed and the stack of the sheet to the rack of the sheet stacking device in which the job stop button has been turned on is completed, and the controller controls the sheet stacking device in which the job stop button has been turned on to move the rack of the sheet stacking device from a stacking position where sheets are stacked to a removal position where the sheets are removed.